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Attribute trajectory analysis : a framework to analyse attribute changes using trajectory analysis techniques / Long Zhang in International journal of geographical information science IJGIS, vol 32 n° 5-6 (May - June 2018)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 32 n° 5-6 (May - June 2018) . - pp 1043 - 1059 Titre : Attribute trajectory analysis : a framework to analyse attribute changes using trajectory analysis techniques Type de document : Article/Communication Auteurs : Long Zhang, Auteur ; Nico Van De Weghe, Auteur Année de publication : 2018 Article en page(s) : pp 1043 - 1059 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] attribut [Termes IGN] mesure de similitude [Termes IGN] objet mobile [Termes IGN] trajectoire (véhicule non spatial) [Vedettes matières IGN] Géovisualisation Résumé : (Auteur) Trajectory analysis has attracted growing attention in the research field of geography. Beyond traditional moving object trajectories, another type of trajectory exists in which the coordinates are object attributes rather than geographical coordinates. In this paper, a framework to analyse these so-called attribute trajectories is proposed that uses four techniques typically employed in the analysis of moving object trajectories: the Reeb graph, the similarity matrix, the convoy and the mega-convoy. The Reeb graph provides the ability to visualise the temporal dynamics of attribute similarities. The similarity matrix is a supplement of the Reeb graph whose purpose is to visualise the pairwise similarities among the attributes. Moreover, the similarity matrix forms a basis for clustering. The convoy highlights objects whose attributes remain similar for a sufficiently long period. The mega-convoy reduces the number of convoys and reveals their evolutionary histories by merging overlapping convoys. A small real-world meteorological dataset is used as an example to illustrate the attribute trajectory analysis framework and the techniques. This paper aims to form a starting point for applying trajectory analysis techniques in many research fields. Numéro de notice : A2018-199 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2018.1435885 Date de publication en ligne : 07/02/2018 En ligne : https://doi.org/10.1080/13658816.2018.1435885 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89868 [article]

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Integrating indoor and outdoor spaces for pedestrian navigation guidance: A review / Ann Vanclooster in Transactions in GIS, vol 20 n° 4 (August 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 4 (August 2016) . - pp 491 - 525 Titre : Integrating indoor and outdoor spaces for pedestrian navigation guidance: A review Type de document : Article/Communication Auteurs : Ann Vanclooster, Auteur ; Nico Van De Weghe, Auteur ; Philippe De Maeyer, Auteur Année de publication : 2016 Article en page(s) : pp 491 - 525 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] état de l'art [Termes IGN] intégration [Termes IGN] navigation pédestre [Termes IGN] piéton [Termes IGN] positionnement en intérieur [Termes IGN] système de navigation Résumé : (auteur) In light of the many improvements within 3D urban modeling and Location-Based Services, this article provides a timely review of the state-of-the-art on integrating indoor and outdoor spaces in pedestrian navigation guidance aids. With people moving seamlessly between buildings and surrounding areas, navigation guidance tools should extend from merely outdoor or indoor guidance, to provide support in the combined indoor-outdoor context. This article first examines the challenges and complexities of integrating indoor and outdoor spaces into a single navigation system. Next, by using objective selection criteria, 36 relevant studies were withheld and further reviewed on their specific developments in data model requirements, and algorithmic and context support for integrated IO navigation systems. This review shows that the challenges of dealing with both indoor and outdoor space structures, while taking into account pedestrian's freer use of space, currently complicate the proposition of a unified IO space concept for navigation. However, there are some ongoing developments (e.g. context definitions, algorithmic extensions, increased data availability, growing awareness of pedestrians’ perception during wayfinding) that will help to bring outdoor and indoor spaces closer together in the realm of combined geospatial analysis. Numéro de notice : A2016-992 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12178 En ligne : http://dx.doi.org/10.1111/tgis.12178 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83766 [article]